Crusher jaw-plate.



WALTER S. MCKEE, 0F CHICAGO, ILLINOIS, AND FRANK E. JOHNSON, 0F SALT LAKE CITY, UTAH, ASSIGNORS TO AMERICAN MANGANESE STEEL COMPANY, 0F AUGUSTA,

MAINE, A CORPORATION 0F MAINE.

CRUSHER TAW-PLATE.

Specification of Letters Patent. `PatentdJune 13, 1916.

Original application filed January 25, 1915, Serial No. 4,088. Divided and this application led February Y To all whom t may concern:

Be it known that we, vWALTER S. MCKEE,

a citizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, and FRANK E. JOHNSON, a citizen of the United States, and a resident of Salt Lake City, in the county of Salt Lake and State of Utah, have made and invented certain new and useful Improvements in Crusher Jaw-Plates, of which the following is a specification.

This invention relates to Crusher jaw plates; an object of the present invention being to provide a jaw plate' which is made up of a plurality of replaceable sections, each section being so designed and constructed that the several sections may be rigidly locked together and thel corrugations and ribs thereof held in alinement before the Crusher j aw plate is assembled in the crushing machine.

This application' is a division of our copending application #4088, filed Jan. 25, 1915.

A further object is to provide improved means for locking together the several sections of a Crusher aw plate, the securement between the several sections being such that the jaw plate may be handled and transported as a single unit.

A further object is to accomplish the above-mentioned ends in a practical and ellicient manner, and with these and other objects in view, our invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention can be made within the scope of what is claimed without departing from the spirit thereof.

The preferred embodiment of our invention is disclosed in the accompanying drawing, wherein Figure 1 is a View in front elevation of our novel sectional jaw plate, portions thereof being broken away to more fully disclose the structural details thereof; Fig. 2 is a .view in vertical section taken on the line 2 2 of Fig. 1; Fig. 3 is a view in section taken on the line 3 3 of Fig. 1; Fig. 4 is a fragmental view in plan, illustrating the back of the crusher jaw plate; Fig. 5

Serial No. 80,561.

is a view in vertical longitudinal section ofl exposed to the greatest wear,`and for this` reason our improved jaw plate is madeup of sections, allowing the lowermost section to be replaced from time to time after it has become worn beyond use, each section thereabove being moved down one space, thus preserving the continuity of the Wearing face of the crusherjaw plate. In order to facilitate the replacement of the lowermost section of the jaw plate, and to insure the proper alinement of the various sections, we provide each section with an undercut or dove-tailed slot 14, into which is forcibly driven a beveled holding key 15. The various sections which go to make up a jaw plate are accordingly held in rigid relation and proper alinement by the holding key, allowing the jaw plate to be inserted into or removed from a crushing machine and handled as though it were an integral casting.

The holding key 15 is provided with an opening 16 with which communicates a recess 17. Each section of the jaw plate, with the exception of the top wedge-section, is provided with a recess 18, the location of which is such that it exactly alines and registers with the recess 17 in the holding key when thesection is occupying the lowermost position in the crusher jaw plate, and the holding key is in its linal and seated position. lThis provision of openings and recesses allows a slug or locking member 19 to be inserted through the opening 16 within the key and deposited within the recess 18 of the lowermost jaw plate section, this being accomplished while the holding key is slightly offset from its final position. The f holding key is then forcibly driven into its final position, bringing the slug or locking member against the sides of the recess 17 and preventing the further movement of the holding key. Y

A somewhat similar arrangement is disclosed in Fig. 5, wherein itwill be observed that the holding key is provided With but a single aperture 20, which is adapted to aline with one of the recesses 21, With which each of the sections of the j aw plate is provided. The slug or locking member 22 in thisinstance is of such size that having once been forced into the alined openings of the key and jaw plate section, it is held against accidental displacement therefrom.

The various sections of our improved jaw plates are not only rigidly secured together, but the holding means is locked against displacement, thus allowing the jaw plates to be handled and transported as though formed as a single casting. The replacement of the loWermost section after it has become excessively Worn is conveniently accomplished by removing the entire j aw plate from the crushing machine, after which, the locking member and holding key may be easily removed and the various changes in the sections of the jaw plate conveniently made.

What We claim is 1. A Crusher jaw plate comprising a plurality of sections, a key engaging said sections and holding the same in alinement, and means engaging said sections and said holding key preventing the accidental detachment thereof.

2. A Crusher yjaw plate comprising a plurality of sections, a key engaging said sections and holding the same in alinement, and a locking member engaging said key and said sections, holding the former against accidental detachment.

3. A Crusher jaw plate comprising a plurality of interchangeably transverse sections provided With alined recesses, a key positioned Within said recess and locking means engaging one of said sections and said key, and holding the same in their assembled relation.

11. A Crusher javv plate comprising a plurality of interchangeable transverse sections provided with alined openings, a key fitting Within said openings and holding said sections in rigid alinement, said key provided with an opening therein, said sections provided With recesses, one of Which is adapted to aline with the opening Within said key, and a locking member itting Within the opening Within said key and a recess Within one of said sections.

5. A crusher jaw plate comprising a pluralit-y of interchangeable sections, each provided With an undercut recess, a beveled key fitting Within said recesses and rigidly holding said sections in alinement, and locking means engaging one of said sections and said key and holding the same in ,their assembled relation.

Signed at Chicago, in the county of Cook and State of Illinois, this 23 day of Febru ary7 1916.

WALTER S. MCKEE. Witnesses:

NELLIE C. BAsoN, EUGENE C. BAUER. Signed at Butte, in the county of SilverboW and State of Montana, this 25th day of January, 1916.

FRANK E. JGHNSON.

Witnesses:

JAMES F. REDDING, M. FIELD.

opiea of this patent may be obtained for ve cents each, by addressing the Gommissioner of llatenta,

Washington, D. C." 

